domínio(n)[group of related items, course of study or domain of knowledge or practice, a field or sphere of activity, influence or expertise, geographic area owned or controlled by a single person or organization]{m}

gebied[course of study or domain of knowledge or practice, area distinguished on the basis of a particular characteristic etc, an area, Kategorie, Wissen, Erdkunde, räumlich, allgemein, Fachbereich]{n}

dziedzina[geographic area owned or controlled by a single person or organization, a field or sphere of activity, influence or expertise, group of related items, course of study or domain of knowledge or practice]{f}